html {
    height: 100%;
}

body {
    font-family: '微软雅黑', Arial, Helvetica, sans-serif;
    color: #000000;
    -webkit-backface-visibility: hidden;
    background: #ffffff;
    height: 100%;
}

.clear:after {
    content: '';
    display: block;
    height: 0;
    clear: both;
}

.hide {
    display: none;
}

.show {
    display: block;
}

.invisible {
    visibility: hidden;
}

a {
    color: inherit;
    cursor: pointer;
}

.popup {
    height: 100%;
    width: 100%;
    position: fixed;
    top: 0;
    left: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 100;
}

.popup .popup_card {
    position: relative;
    background-color: #fff;
    color: #323232;
    width: 16.325rem;
    height: auto;
    border-radius: 20px;
    /* margin: 5.5rem auto; */
    box-shadow: 0 -4px 10px #775c5a;
    padding: 0.5rem 0;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.popup .popup_card .popup_close {
    height: .8rem;
    width: .8rem;
    cursor: pointer;
    background-color: #000000;
    position: absolute;
    top: 1.1rem;
    right: 1rem;
    background: url(i/i-close.png) no-repeat center;
    background-size: 100%;
}

@media screen and (max-width: 750px) {
    html {
        font-size: 40px;
    }
}

@media screen and (max-width: 640px) {
    html {
        font-size: 34px;
    }
}

@media screen and (max-width: 414px) {
    html {
        font-size: 22px;
    }
}

@media screen and (max-width: 393px) {
    html {
        font-size: 20.96px;
    }
}

@media screen and (max-width: 384px) {
    html {
        font-size: 20.48px;
    }
}

@media screen and (max-width: 375px) {
    html {
        font-size: 20px;
    }
}

@media screen and (max-width: 360px) {
    html {
        font-size: 19.2px;
    }
}

@media screen and (max-width: 320px) {
    html {
        font-size: 17px;
    }
}